Je viens de tester les débits entre une box Salt X6 fibre à Genève et ma Freebox Ultra à Lyon, avec iperf3 --bidir et une seule connexion IPv4.
BBR des deux côtés :
[ ID][Role] Interval Transfer Bitrate Retr Cwnd
[ 5][TX-C] 0.00-1.00 sec 859 MBytes 7.20 Gbits/sec 26629 31.2 MBytes
[ 7][RX-C] 0.00-1.00 sec 676 MBytes 5.66 Gbits/sec
[ 5][TX-C] 1.00-2.00 sec 902 MBytes 7.57 Gbits/sec 10274 38.4 MBytes
[ 7][RX-C] 1.00-2.00 sec 796 MBytes 6.69 Gbits/sec
[ 5][TX-C] 2.00-3.00 sec 795 MBytes 6.66 Gbits/sec 11262 38.5 MBytes
[ 7][RX-C] 2.00-3.00 sec 779 MBytes 6.53 Gbits/sec
[ 5][TX-C] 3.00-4.00 sec 912 MBytes 7.65 Gbits/sec 13826 38.9 MBytes
[ 7][RX-C] 3.00-4.00 sec 780 MBytes 6.54 Gbits/sec
[ 5][TX-C] 4.00-5.00 sec 790 MBytes 6.63 Gbits/sec 25730 39.2 MBytes
[ 7][RX-C] 4.00-5.00 sec 806 MBytes 6.76 Gbits/sec
[ 5][TX-C] 5.00-6.00 sec 887 MBytes 7.44 Gbits/sec 5521 40.2 MBytes
[ 7][RX-C] 5.00-6.00 sec 815 MBytes 6.84 Gbits/sec
[ 5][TX-C] 6.00-7.00 sec 918 MBytes 7.70 Gbits/sec 12578 37.4 MBytes
[ 7][RX-C] 6.00-7.00 sec 824 MBytes 6.92 Gbits/sec
[ 5][TX-C] 7.00-8.00 sec 814 MBytes 6.83 Gbits/sec 20298 32.5 MBytes
[ 7][RX-C] 7.00-8.00 sec 814 MBytes 6.83 Gbits/sec
[ 5][TX-C] 8.00-9.00 sec 822 MBytes 6.89 Gbits/sec 10403 39.6 MBytes
[ 7][RX-C] 8.00-9.00 sec 776 MBytes 6.51 Gbits/sec
[ 5][TX-C] 9.00-10.00 sec 880 MBytes 7.35 Gbits/sec 18138 36.8 MBytes
[ 7][RX-C] 9.00-10.00 sec 800 MBytes 6.69 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID][Role] Interval Transfer Bitrate Retr
[ 5][TX-C] 0.00-10.00 sec 8.38 GBytes 7.19 Gbits/sec 154659 sender
[ 5][TX-C] 0.00-10.04 sec 8.03 GBytes 6.88 Gbits/sec receiver
[ 7][RX-C] 0.00-10.00 sec 7.88 GBytes 6.76 Gbits/sec 21794 sender
[ 7][RX-C] 0.00-10.04 sec 7.68 GBytes 6.58 Gbits/sec receiver
iperf Done.
CUBIC des deux côtés :
[ ID][Role] Interval Transfer Bitrate Retr Cwnd
[ 5][TX-C] 0.00-1.00 sec 359 MBytes 3.01 Gbits/sec 0 16.2 MBytes
[ 7][RX-C] 0.00-1.00 sec 348 MBytes 2.92 Gbits/sec
[ 5][TX-C] 1.00-2.00 sec 814 MBytes 6.83 Gbits/sec 1158 17.0 MBytes
[ 7][RX-C] 1.00-2.00 sec 379 MBytes 3.18 Gbits/sec
[ 5][TX-C] 2.00-3.00 sec 699 MBytes 5.87 Gbits/sec 0 17.8 MBytes
[ 7][RX-C] 2.00-3.00 sec 371 MBytes 3.11 Gbits/sec
[ 5][TX-C] 3.00-4.00 sec 702 MBytes 5.88 Gbits/sec 0 18.6 MBytes
[ 7][RX-C] 3.00-4.00 sec 343 MBytes 2.88 Gbits/sec
[ 5][TX-C] 4.00-5.00 sec 377 MBytes 3.17 Gbits/sec 497 9.43 MBytes
[ 7][RX-C] 4.00-5.01 sec 354 MBytes 2.93 Gbits/sec
[ 5][TX-C] 5.00-6.00 sec 342 MBytes 2.87 Gbits/sec 0 9.76 MBytes
[ 7][RX-C] 5.01-6.00 sec 364 MBytes 3.09 Gbits/sec
[ 5][TX-C] 6.00-7.00 sec 407 MBytes 3.42 Gbits/sec 0 10.0 MBytes
[ 7][RX-C] 6.00-7.00 sec 404 MBytes 3.39 Gbits/sec
[ 5][TX-C] 7.00-8.00 sec 410 MBytes 3.44 Gbits/sec 0 10.3 MBytes
[ 7][RX-C] 7.00-8.00 sec 405 MBytes 3.40 Gbits/sec
[ 5][TX-C] 8.00-9.00 sec 467 MBytes 3.92 Gbits/sec 0 10.5 MBytes
[ 7][RX-C] 8.00-9.00 sec 340 MBytes 2.85 Gbits/sec
[ 5][TX-C] 9.00-10.00 sec 480 MBytes 4.02 Gbits/sec 0 10.7 MBytes
[ 7][RX-C] 9.00-10.00 sec 342 MBytes 2.87 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID][Role] Interval Transfer Bitrate Retr
[ 5][TX-C] 0.00-10.00 sec 4.96 GBytes 4.26 Gbits/sec 1655 sender
[ 5][TX-C] 0.00-10.02 sec 4.85 GBytes 4.16 Gbits/sec receiver
[ 7][RX-C] 0.00-10.00 sec 3.59 GBytes 3.08 Gbits/sec 42 sender
[ 7][RX-C] 0.00-10.02 sec 3.56 GBytes 3.05 Gbits/sec receiver
iperf Done.
J'ai aussi fait des tests en ne mettant qu'un côté en CUBIC et l'autre en BBR et ça fait des résultats rigolos comme ça (TX = CUBIC qui envoie) :
[ 5][TX-C] 0.00-10.02 sec 2.72 GBytes 2.33 Gbits/sec receiver
[ 7][RX-C] 0.00-10.02 sec 7.85 GBytes 6.73 Gbits/sec receiver
Le traceroute montre que ça passe par Cogent à Paris.